Adjusting new sights

[jtmattison]

Maybe someone can make sense of this for me.

I have a new barrel for my GPR that I will be shooting tomorrow for the first time.

Lyman's recommends lowering the rear site completely and filing the front site down to raise the point of impact to the desired spot.

To me this seems like you are not leaving youself room to adjust the sights down if needed.

I usually set the rear site in the middle, then file the front site to get my POI where I want it. I feel that gives me more room for adjustments with a wider range of powder charges.

Thoughts?

HD

 

[Legionair]

Yeah.... lowering both sites doesn't make any sense to me, either.

I'd do as much as possible to NOT file anything unless necessary. If I could adjust the rear and hit what I want without filing... I'd be happy with that. I could always go back and mess with them later, if necessary.

It's tough to add metal thats been filed off.....

Legion

 

[jimeckersley]

I would do what you always do. If you adjust the rear sight all the way down to begin with, you'll never be able to lower the aim point without buying a new front blade. You're right, Lyman is ...well ...lets just say they don't leave you any wiggle room!

 

[Mad Professor]

IMO filing before seeing where it hits in advance is lunacy.

That is unless lyman knows their front sights are too tall for anything you plan on feeding it? If this was the case I'd assume they'd shorten it themselves?

Will they provide a 2nd sight if it's too short per their suggestion?

 

[tg]

I would use the solid type rear then adjust the front with a file, the adjustable rear type is a POC, and has a tendency to move, work up a load for a good group and do not worry about elevation untill after that, then file to prefered position.This worked well on a Lyman i put together several years ago.

 

[jtmattison]

IMO filing before seeing where it hits in advance is lunacy.

That is unless lyman knows their front sights are too tall for anything you plan on feeding it? If this was the case I'd assume they'd shorten it themselves?

Will they provide a 2nd sight if it's too short per their suggestion?

They don't suggest filing before you shoot.
They say to lower the rear site completely and shoot. Then file the front site to raise the POI.
Their front sites are very high. I have had to file every one I own about half off to get it up on target at 50 yards.

Unfortunately my barrel didn't come with a fixed rear site, just the adjustable. I guess they only ship both sites with complete guns. This is my third barrel for this GPR. I shoot both .54 barrels, 1:60 and 1:32 and now I have this .50 1:60 barrel for it.

HD

 

[Rebel]

Maybe it is because they know that their adjustable rear sight is junk, and moves around unless cinched down like that. Just throw it away and use the fixed sight. Better sight picture too. Then file your front sight to POA after shooting it some.

 

[arcticap]

If you followed Lyman's instruction's and sighted in with a PRB while filing down the front sight, you may not have any down wriggle room, but you would have the maximum amount of elevation adjustment remaining in the sight for long range shooting of the heaviest conical bullets.
I'm not saying that you should do it that way, just trying to figure out the reason for their sighting in procedure. :hmm: